Solved

Change background color of cell in .Net Winforms DataGrid

Posted on 2006-11-13
6
787 Views
Last Modified: 2013-11-22
Hi

Can somebody show me some example code that changes the color of a specific cell in a .net winforms datagrid?

I want to programatically change the cell color if it's a certain value
0
Comment
Question by:zattz
  • 3
  • 2
6 Comments
 

Author Comment

by:zattz
ID: 17929788
I found the following C# code on http://www.syncfusion.com/FAQ/WindowsForms/FAQ_c44c.aspx#q745q
but I don't know how to translate it to delphi.net

[C#]
 
     public class DataGridColoredTextBoxColumn : DataGridTextBoxColumn
 
     {
 
          protected override void Paint(System.Drawing.Graphics g,
 
               System.Drawing.Rectangle bounds, System.Windows.Forms.CurrencyManager
 
               source, int rowNum, System.Drawing.Brush backBrush, System.Drawing.Brush
 
               foreBrush, bool alignToRight)
 
          {
 
          // the idea is to conditionally set the foreBrush and/or backbrush
 
          // depending upon some crireria on the cell value
 
          // Here, we color anything that begins with a letter higher than 'F'
 
               try{
 
                    object o = this.GetColumnValueAtRow(source, rowNum);
 
                    if( o!= null)
 
                    {
 
                         char c = ((string)o)[0];
 
                         if( c > 'F')
 
                         {
 
                         // could be as simple as
 
                         // backBrush = new SolidBrush(Color.Pink);
 
                         // or something fancier...
 
                              backBrush = new LinearGradientBrush(bounds,
 
                                   Color.FromArgb(255, 200, 200),
 
                                   Color.FromArgb(128, 20, 20),
 
                                   LinearGradientMode.BackwardDiagonal);
 
                              foreBrush = new SolidBrush(Color.White);
 
                         }
 
                    }
 
               }
 
                catch(Exception ex){ /* empty catch */ }
 
               finally{
 
                    // make sure the base class gets called to do the drawing with
 
                    // the possibly changed brushes
 
                    base.Paint(g, bounds, source, rowNum, backBrush, foreBrush, alignToRight);
 
               }
 
          }
 
     }
0
 
LVL 26

Expert Comment

by:EddieShipman
ID: 17931517
Personally, I wouldn't use the built-in datagrids for ANYTHING because of their limitations.
Try SourceGrid from here: http://www.devage.com/SourceGrid/SourceGrid_EN.html

Although it is written in C#, you can user th eassmeblies with Delphi.Net.

It is an excellent control with so much functionality.

0
 
LVL 26

Expert Comment

by:EddieShipman
ID: 17931535
Oh, BTW, the new version is only .Net2 compatible so download one of the older versions here:
http://www.devage.com/SourceGrid/SourceGridVersions.html
0
Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

 

Author Comment

by:zattz
ID: 17932942
For this project I have to use the .NET built in datagrid
0
 
LVL 22

Accepted Solution

by:
Mohammed Nasman earned 500 total points
ID: 17936719
Hi,
 
  I just made quick conversion,  and used Employees table from northwind db to test it, and worked fine

uses
  System.Drawing.Drawing2D;

//
  type
  DataGridColoredTextBoxColumn = class(DataGridTextBoxColumn)
   protected
    procedure Paint(g: System.Drawing.Graphics; bounds: System.Drawing.Rectangle;
      source: System.Windows.Forms.CurrencyManager; rowNum: Integer; backBrush: System.Drawing.Brush;
      foreBrush: System.Drawing.Brush; alignToRight: Boolean); override;
  end;

// implementation

procedure TWinForm.TWinForm_Load(sender: System.Object; e: System.EventArgs);
var
tableStyle : DataGridTableStyle;
i, numCols : Integer;
aColumnTextColumn :  DataGridColoredTextBoxColumn;
begin
  bdpDataAdapter1.Fill(ds,'Employees');
  tableStyle := DataGridTableStyle.Create;
  tableStyle.MappingName := 'Employees';
  numCols := ds.Tables['Employees'].Columns.Count;

  for I := 0 to numCols - 1 do
  begin
    aColumnTextColumn := DataGridColoredTextBoxColumn.Create;
    aColumnTextColumn.HeaderText := ds.Tables['Employees'].Columns[i].ColumnName;
    aColumnTextColumn.MappingName := ds.Tables['Employees'].Columns[i].ColumnName;
    tableStyle.GridColumnStyles.Add(aColumnTextColumn);
  end;

  dataGrid1.TableStyles.Clear;
  dataGrid1.TableStyles.Add(tableStyle);
  dataGrid1.DataSource := ds.Tables['Employees'];

end;

{ DataGridColoredTextBoxColumn }

procedure DataGridColoredTextBoxColumn.Paint(g: System.Drawing.Graphics; bounds: System.Drawing.Rectangle;
  source: System.Windows.Forms.CurrencyManager; rowNum: Integer; backBrush: System.Drawing.Brush;
  foreBrush: System.Drawing.Brush; alignToRight: Boolean);
var
  c: WideChar;
  o: System.Object;
begin
  try
    try
      o := Self.GetColumnValueAtRow(source, rowNum);
      if (o <> nil) then
      begin
        c := string(o)[1];
        if (c > 'F') then
        begin
          backBrush := LinearGradientBrush.Create(bounds, Color.FromArgb(255,
                200, 200), Color.FromArgb(128, 20, 20), LinearGradientMode.BackwardDiagonal);
          foreBrush := SolidBrush.Create(Color.White);
        end;
      end;
    except
      on ex: Exception do
      ;
    end;
  finally
    inherited Paint(g, bounds, source, rowNum, backBrush, foreBrush, alignToRight);
  end;
end;


HTH

Best Regards,
Mohammed Nasman
0
 

Author Comment

by:zattz
ID: 17936815
Thank you so much Mohammed. I really appreciate it.
0

Featured Post

ScreenConnect 6.0 Free Trial

Want empowering updates? You're in the right place! Discover new features in ScreenConnect 6.0, based on partner feedback, to keep you business operating smoothly and optimally (the way it should be). Explore all of the extras and enhancements for yourself!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Introduction I have seen many questions in this Delphi topic area where queries in threads are needed or suggested. I know bumped into a similar need. This article will address some of the concepts when dealing with a multithreaded delphi database…
In my programming career I have only very rarely run into situations where operator overloading would be of any use in my work.  Normally those situations involved math with either overly large numbers (hundreds of thousands of digits or accuracy re…
This Micro Tutorial hows how you can integrate  Mac OSX to a Windows Active Directory Domain. Apple has made it easy to allow users to bind their macs to a windows domain with relative ease. The following video show how to bind OSX Mavericks to …
Windows 10 is mostly good. However the one thing that annoys me is how many clicks you have to do to dial a VPN connection. You have to go to settings from the start menu, (2 clicks), Network and Internet (1 click), Click VPN (another click) then fi…

770 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question